<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>无序列表</title>
</head>
<body>
    <!-- 1.ul里面只能放li，li里面可以放其他标签
    2.默认的是黑色的实心圆
    3.type：disc默认实心圆，circle空心圆，squarez正方形实心，none没有列表(用的多)
    -->
    <ul type="none">
        <li>aaaaa</li>
        <li>aaaaa</li>
        <li>aaaaa</li>
    </ul>
</body>
</html>